Heating vessel

1. A vessel for heating contents thereof by means of an external heat source, the vessel comprising:

a non-horizontal side wall terminating at a base of the vessel; and

a heat transfer structure comprising a plurality of ribs or fins attached to and in good thermal contact with, or formed integrally on, an outer surface of said side wall, wherein the plurality of ribs or fins comprise a shape that tapers in a direction away from the side wall;

wherein each rib or fin of the plurality of ribs or fins extends radially outward from the side wall, and comprises an upper end, a lower end, an upper outermost radial extent proximate to the upper end, a lower outermost radial extent proximate to the lower end, and a reduced outermost radial extent at a position between the upper end and the lower end,

wherein for each rib or fin of the plurality of ribs or fins, each of the upper outermost radial extent and the lower outermost radial extent is greater than the reduced outermost radial extent; and

wherein the plurality of ribs or fins extend along the side wall and extend in a continuous manner from the side wall to an underside of at least a portion of the base of the vessel.

2. A vessel as claimed in claim 1 , configured for placement on a gas stove.

3. A vessel as claimed in claim 1 , wherein the vessel is suitable for heating liquid and/or food contents.

4. A vessel as claimed in claim 1 , wherein the base is substantially horizontal, and wherein the side wall is continuous around the vessel and extends upwardly from the base.

5. A vessel as claimed in claim 1 , wherein the side wall comprises a circular cylinder shape.

6. A vessel as claimed in claim 1 , wherein the plurality of ribs or fins are provided on a portion of the side wall spaced at least 7 cm, or at least 10 cm, from a centroid of the underside of the vessel.

7. A vessel as claimed in claim 1 , wherein the plurality of ribs or fins are directly and/or permanently attached to the side wall.

8. A vessel as claimed in claim 1 , wherein the plurality of ribs or fins comprise strips.

9. A vessel as claimed in claim 1 , wherein the plurality of ribs or fins extend vertically.

10. A vessel as claimed in claim 1 , wherein the plurality of ribs or fins extend along an entire length of the side wall.

11. A vessel as claimed in claim 1 , wherein the plurality of ribs or fins are equally spaced around the side wall.

12. A vessel as claimed in claim 1 , wherein the plurality of ribs or fins comprise at least four ribs or fins.

13. A vessel as claimed in claim 1 , wherein the plurality of ribs or fins project from the side wall by at least 5% of a diameter of the vessel.

14. A vessel as claimed in claim 1 , wherein the plurality of ribs or fins are formed directly on the side wall of the vessel.

15. A vessel as claimed in claim 1 , wherein the plurality of ribs or fins extending in a continuous manner from the side wall to the underside of the at least a portion of the base of the vessel are arranged to permit the vessel to stand flat on a flat surface.

16. A vessel for heating contents thereof by means of an external heat source, the vessel comprising:

a non-horizontal side wall terminating at a base of the vessel; and

a plurality of ribs or fins attached to and in good thermal contact with, or formed integrally on, an outer surface of said side wall;

wherein each rib or fin of the plurality of ribs or fins extends radially outward from the side wall, each rib or fin comprises an upper end and a lower end, and each rib or fin comprises an outermost radial extent proximate to the lower end and an outermost radial extent proximate to the upper end that are each greater than an outermost radial extent at a position between the lower and upper ends; and

wherein each rib or fin extends along the side wall and extends in a continuous manner from the side wall to an underside of at least a portion of the base of the vessel.

17. A vessel as claimed in claim 16 , wherein the plurality of ribs or fins extend vertically along the side wall.

18. A vessel for heating contents thereof by means of an external heat source, the vessel comprising:

a non-horizontal side wall; and

a plurality of ribs or fins attached to and in good thermal contact with, or formed integrally on, an outer surface of said side wall;

wherein each rib or fin of the plurality of ribs or fins extends radially outward from the side wall, each rib or fin comprises an upper end and a lower end, and each rib or fin comprises an outermost radial extent proximate to the lower end and an outermost radial extent proximate to the upper end that are each greater than an outermost radial extent at a position between the lower and upper ends.

19. A vessel as claimed in claim 18 , wherein the plurality of ribs or fins extend vertically along said side wall.